Question

What causes diffraction that results in a fuzzy glow around a full moon?

Answer 1

B

Step-by-step explanation:

We know that moon is a non-luminous body. It reflects the light received from Sun towards the earth. We are able to see the light of the moon when the Sunlight is reflected off its surface and passes through the atmosphere of the Earth before reaching our eyes. The diffraction occurs when this reflected light bends around the tiny atmospheric particles. This creates a fuzzy glow around the moon. This happens in the Earth's atmosphere.

Answer 2

Well, that's not actually "diffraction".

The fuzzy edge of the moon, and the added glow that's sometimes seen
around it, are all effects caused by the light passing through air before it
reaches you.

This gives you some idea of why astronomers go to such effort and
expense to get their telescopes above as much of the atmosphere as
possible ... placing all serious observatories on mountaintops, and even
putting telescopes in orbit. It's all because the air does such a job on the
light that's trying to shine through it. We have to make do with whatever's
left over after that.